From http://epoch.cs.berkeley.edu:8000/sequoia/dba/montage/FAQ/SQL.html
  by Jean Anderson (jta@postgres.berkeley.edu)

What are the SQL reserved words? 

I grep'd the following list out of the sql docs available via anonymous ftp to speckle.ncsl.nist.gov:/isowg3.
SQL3 words are not set in stone, but you'd do well to avoid them. 

    From sql1992.txt:

         AFTER, ALIAS, ASYNC, BEFORE, BOOLEAN, BREADTH,
         COMPLETION, CALL, CYCLE, DATA, DEPTH, DICTIONARY, EACH, ELSEIF,
         EQUALS, GENERAL, IF, IGNORE, LEAVE, LESS, LIMIT, LOOP, MODIFY,
         NEW, NONE, OBJECT, OFF, OID, OLD, OPERATION, OPERATORS, OTHERS,
         PARAMETERS, PENDANT, PREORDER, PRIVATE, PROTECTED, RECURSIVE, REF,
         REFERENCING, REPLACE, RESIGNAL, RETURN, RETURNS, ROLE, ROUTINE,
         ROW, SAVEPOINT, SEARCH, SENSITIVE, SEQUENCE, SIGNAL, SIMILAR,
         SQLEXCEPTION, SQLWARNING, STRUCTURE, TEST, THERE, TRIGGER, TYPE,
         UNDER, VARIABLE, VIRTUAL, VISIBLE, WAIT, WHILE, WITHOUT

    From sql1992.txt (Annex E):

         ABSOLUTE, ACTION, ADD, ALLOCATE, ALTER, ARE, ASSERTION, AT, BETWEEN,
         BIT, BIT

What are the SQL reserved words? 

I grep'd the following list out of the sql docs available via anonymous ftp to speckle.ncsl.nist.gov:/isowg3.
SQL3 words are not set in stone, but you'd do well to avoid them. 

    From sql1992.txt:

         AFTER, ALIAS, ASYNC, BEFORE, BOOLEAN, BREADTH,
         COMPLETION, CALL, CYCLE, DATA, DEPTH, DICTIONARY, EACH, ELSEIF,
         EQUALS, GENERAL, IF, IGNORE, LEAVE, LESS, LIMIT, LOOP, MODIFY,
         NEW, NONE, OBJECT, OFF, OID, OLD, OPERATION, OPERATORS, OTHERS,
         PARAMETERS, PENDANT, PREORDER, PRIVATE, PROTECTED, RECURSIVE, REF,
         REFERENCING, REPLACE, RESIGNAL, RETURN, RETURNS, ROLE, ROUTINE,
         ROW, SAVEPOINT, SEARCH, SENSITIVE, SEQUENCE, SIGNAL, SIMILAR,
         SQLEXCEPTION, SQLWARNING, STRUCTURE, TEST, THERE, TRIGGER, TYPE,
         UNDER, VARIABLE, VIRTUAL, VISIBLE, WAIT, WHILE, WITHOUT

    From sql1992.txt (Annex E):

         ABSOLUTE, ACTION, ADD, ALLOCATE, ALTER, ARE, ASSERTION, AT, BETWEEN,
         BIT, BIT

What are the SQL reserved words? 

I grep'd the following list out of the sql docs available via anonymous ftp to speckle.ncsl.nist.gov:/isowg3.
SQL3 words are not set in stone, but you'd do well to avoid them. 

    From sql1992.txt:

         AFTER, ALIAS, ASYNC, BEFORE, BOOLEAN, BREADTH,
         COMPLETION, CALL, CYCLE, DATA, DEPTH, DICTIONARY, EACH, ELSEIF,
         EQUALS, GENERAL, IF, IGNORE, LEAVE, LESS, LIMIT, LOOP, MODIFY,
         NEW, NONE, OBJECT, OFF, OID, OLD, OPERATION, OPERATORS, OTHERS,
         PARAMETERS, PENDANT, PREORDER, PRIVATE, PROTECTED, RECURSIVE, REF,
         REFERENCING, REPLACE, RESIGNAL, RETURN, RETURNS, ROLE, ROUTINE,
         ROW, SAVEPOINT, SEARCH, SENSITIVE, SEQUENCE, SIGNAL, SIMILAR,
         SQLEXCEPTION, SQLWARNING, STRUCTURE, TEST, THERE, TRIGGER, TYPE,
         UNDER, VARIABLE, VIRTUAL, VISIBLE, WAIT, WHILE, WITHOUT

    From sql1992.txt (Annex E):

         ABSOLUTE, ACTION, ADD, ALLOCATE, ALTER, ARE, ASSERTION, AT, BETWEEN,
         BIT, BIT_LENGTH, BOTH, CASCADE, CASCADED, CASE, CAST, CATALOG,
         CHAR_LENGTH, CHARACTER_LENGTH, COALESCE, COLLATE, COLLATION, COLUMN,
         CONNECT, CONNECTION, CONSTRAINT, CONSTRAINTS, CONVERT, CORRESPONDING,
         CROSS, CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP, CURRENT_USER,
         DATE, DAY, DEALLOCATE, DEFERRABLE, DEFERRED, DESCRIBE, DESCRIPTOR,
         DIAGNOSTICS, DISCONNECT, DOMAIN, DROP, ELSE, END-EXEC, EXCEPT,
         EXCEPTION, EXECUTE, EXTERNAL, EXTRACT, FALSE, FIRST, FULL, GET,
         GLOBAL, HOUR, IDENTITY, IMMEDIATE, INITIALLY, INNER, INPUT,
         INSENSITIVE, INTERSECT, INTERVAL, ISOLATION, JOIN, LAST, LEADING,
         LEFT, LEVEL, LOCAL, LOWER, MATCH, MINUTE, MONTH, NAMES, NATIONAL,
         NATURAL, NCHAR, NEXT, NO, NULLIF, OCTET_LENGTH, ONLY, OUTER, OUTPUT,
         OVERLAPS, PAD, PARTIAL, POSITION, PREPARE, PRESERVE, PRIOR, READ,
         RELATIVE, RESTRICT, REVOKE, RIGHT, ROWS, SCROLL, SECOND, SESSION,
         SESSION_USER, SIZE, SPACE, SQLSTATE, SUBSTRING, SYSTEM_USER,
         TEMPORARY, THEN, TIME, TIMESTAMP, TIMEZONE_HOUR, TIMEZONE_MINUTE,
         TRAILING, TRANSACTION, TRANSLATE, TRANSLATION, TRIM, TRUE, UNKNOWN,
         UPPER, USAGE, USING, VALUE, VARCHAR, VARYING, WHEN, WRITE, YEAR, ZONE

    From sql3part2.txt (Annex E)

         ACTION, ACTOR, AFTER, ALIAS, ASYNC, ATTRIBUTES, BEFORE, BOOLEAN,
         BREADTH, COMPLETION, CURRENT_PATH, CYCLE, DATA, DEPTH, DESTROY,
         DICTIONARY, EACH, ELEMENT, ELSEIF, EQUALS, FACTOR, GENERAL, HOLD,
         IGNORE, INSTEAD, LESS, LIMIT, LIST, MODIFY, NEW, NEW_TABLE, NO,
         NONE, OFF, OID, OLD, OLD_TABLE, OPERATION, OPERATOR, OPERATORS,
         PARAMETERS, PATH, PENDANT, POSTFIX, PREFIX, PREORDER, PRIVATE,
         PROTECTED, RECURSIVE, REFERENCING, REPLACE, ROLE, ROUTINE, ROW,
         SAVEPOINT, SEARCH, SENSITIVE, SEQUENCE, SESSION, SIMILAR, SPACE,
         SQLEXCEPTION, SQLWARNING, START, STATE, STRUCTURE, SYMBOL, TERM,
         TEST, THERE, TRIGGER, TYPE, UNDER, VARIABLE, VIRTUAL, VISIBLE,
         WAIT, WITHOUT

    sql3part4.txt (ANNEX E):

         CALL, DO, ELSEIF, EXCEPTION, IF, LEAVE, LOOP, OTHERS, RESIGNAL,
         RETURN, RETURNS, SIGNAL, TUPLE, WHILE